Pinking machine



0 K. s. CHRISTENSEN 2,520,529

PINKING MACHINE Filed June 18, 1949 llll w Z'mnemor u 3 I Gttorneggs Patented Aug. 29, 1950 PINKING MACHINE Kai S. Christensen, Norwalk, Conn, assignor, by mesne assignments, to Samuel Briskman, New

York, N. Y.

Application'June 18, 1949, Serial No. 99,982

7 Claims. (01. 164-434) The present invention relates to pinking machines.

It is an object of the invention to provide a pinking machine which is simple in construction and safe and reliable in operation.

Another object of the invention is to provide a pinking device on which the work-supporting surface on either side of the plane of the pinking wheel or the line of cutting thereof is unobstructed for free manipulation, by the hands of the operator, of the work thereover. A feature of the invention resides in the structure of the arm with relation to the pinking wheel aperture in the top whereby the arm extends down and substantially covers the aperture to avoid the danger of contact of thewheel by the hands of the operator as the material is fed past the pinking wheel. Since there are no obstructions on either side of the line of cutting, the pinking out can be formed either as a straight line or as a curved lin as required. To facilitate the separation of the cut pieces a separator sur-- face is provided on a post to the rear of the pinking wheel to separate the cut edges as they are fed through the machine.

The pinking device of the present invention is a compact, portable unit which can be. readily assembled.

Other features and advantages of the inven.

tion will be apparent from the specification and claims when considered in connection with the drawings in which:

Figure 1 shows a perspective view ing device.

Fig. 2 shows a longitudinal sectional view.

Fig. 3 shows a front end view.

Fig. 4 shows a plan view of the device with housing and arm removed.

As shown in the drawings the device comprises a base it? having suitable feet ii of rubber or the like secured at the corners thereof by securing means l2. A pinking wheel it having a zigzag cutting edge 14 is carried by a shaft l mount ed in bearings it carried in bearing plates l! on bearing block it detachably secured to the base by securing means l9.

The wheel l3 may be driven in anysuitable manner. In the illustrated form of-the invention it is driven by an electric motor 20. If the motor .is a relatively low speed motor it can, of course, be directly connected to the wheel. However, it is at present preferred to employ a motor having a higher speed and drive the wheel through a reduction gearing. This is accomplished by means of a worm gear 21 mounted n the of the. i s

the armature shaft 22. The projecting end or the armature shaft is supported in an outboard bearing 23. The worm gear meshes with and drives a worm gear 2la onshaft l5 carrying the pinking Wheel l3.

The motor and pinking wheel are enclosed by a housing 2'4 positioned on the base. The housing has end walls 25, side walls 26 and a flat top 2?. As shown in Fig. 2, the motor has a pad 28 secured on the top thereof which extends under the top of the housing to support the same. The flat top 2? forms a work-supporting surface and has a narrow, elongate opening or aperture 29 therein to receive the pinking wheel.

As is clear from the drawings, the pinking wheel lies in a plane perpendicular to the top of the housing and is so positioned with respect to the top that it lies in the opening which extends in the direction of the plane of the wheel with the cutting edge of the wheel forming a tangent with the work-supporting surface of the top.

A presser roller 30 is carried by the forward end'of' an arm 3|. The roller cooperates with the cutting edge of the pinking wheel to out and feed work through the machine. In the illustrated form of the invention the arm is supported by post32 which is carried by the pad 28 and projecting above the work support through an aperture 33 in the top of the housing. The arm extends along the plane of the pinking wheel and is pivotally mounted on the post 32 by a pivot pin 34. The pivot pin and arm cooperating with the post also form the sole means in the present combination for holding the housing on the base. In order to adjust the pressure of the roller to properly press the work against the cutting edge as the work passes therebetween the rear end of the arm is tapped and an adjusting screw 35 threaded therein into engagement with the top of the housing to cause the arm to pivot on pivot pin 34. The adjusting screw engages the top at a point lying in the plane of the pinking wheel. A look nut 35 or other securing means secures the screw in adjusted position.

As is clear from Figs. 1 and 2, the arm is (acextensive with and overlies the opening 29 in the housing and is provided with sides Me which extend. down to a point adjacent the top of the housing. This etlectively shields the pinking wheel and prevents contact therewith by the hands of the operator as work is manipulated over the work-supporting. surface.

It will be seen that by the present arrange ment of the elements in the device, the worksupporting surface on each side of the pinking wheel is continuous and that the arm. supporting post therefor and the adjusting means for the arm are all in line with the plane of the cutting wheel and the lin of cutting of the work as it is fed therethrough so that the top of the housing is unobstructed on either side of the plane of the cutting wheel thus enabling the operator's hands to move thereover without interference with any projecting parts as the work is manipulated to cut straight or curved lines as required.

To facilitate the movement of the work past the post, it is preferred to form the edge of the post adjacent the pinking wheel with deflecting surfaces 37 which separate out edges as the work is fed through the machine.

If desired, the front end of the arm can be provided with an indicator 38 which projects down over the front of the arm to indicate the line of cutting of the pinking wheel. If desired, a work guide 39 having an elongate slot 40 can be detachably and adjustably mounted on the top of the housing at one side of the aperture 29 by means of a screw 41. When it is desired to cut a straight edge a predetermined distance from the edge of the material the guide may be moved up to such relation with the wheel as to provide for this cutting. If the guide is not needed, of course, it may be removed,

The motor may be controlled in any suitable way. As shown in Fig. 4, one lead 42 from the source of power goes directly to the motor while the other lead 43 from the source of power goes to a terminal of plug receptacle 44, the other terminal of plug receptacle 44 being connected by lead 45 to the motor. The contact plug 46 is adapted to be plugged into receptacle 44 and to connect a motor controller 4''! which may be a foot-operated rheostat connected thereto to control the speed of the motor in the usual way.

Variations and modifications may be made within the scope of the claims and portions of the improvements may be used without others.

I claim:

1. In a pinking machine, a work-supporting surface having a narrow, elongate aperture therein extending in the direction of movement of the material thereover; a rotary, driven pinking wheel having a peripheral cutting edge disposed in the aperture with the work-supporting surface forming a tangent with the cutting edge thereof, the cutting edge of said wheel cutting and feeding the work over the support; arm mounting means positioned on the line of cutting behind the aperture; an arm centrally pivotally carried by the mounting means and having a presser roller at the forward end thereof cooperating with the pinking wheel, said arm overlying the aperture and preventing contact of the pinking wheel by the operator; and adjusting means carried by the rear end of the arm and bearing on the work-supporting surface on the line of feed for adjusting the pressure of the presser roller against the pinking wheel.

2. In a pinking machine, a work-supporting surface having a narrow, elongate aperture therein extending in the direction of movement of the material thereover; a rotary, driven pinking wheel having a peripheral cutting edge disposed in the aperture with the work-supporting surface forming a tangent with the cutting edge thereof, the cutting edge of said wheel cutting and feeding the work over the support; an arm mounting post positioned on the line of cutting behind the aperture; an arm having a presser roller thereon; and pivot means connecting the central portion of the arm to the post to pivot thereon with the roller cooperating with the pinking wheel, said arm overlying the aperture and preventing contact of the pinking wheel by the operator, said work support on either side of the arm being continuous and unobstructed whereby the operator can manipulate and control the movement of the material thereover.

3. In a pinking machine, a work-supporting surface having a narrow, elongate aperture therein extending in the direction of movement of the material thereovei'; a rotary, driven pinking wheel having a peripheral cutting edge disposed in the aperture with the work-supporting surface forming a tangent with the cutting edge thereof, said wheel cutting and feeding the work over the support; arm mounting means positioned on the line of cutting behind the aperture; and an arm centrally pivotally carried by the mounting means and having a presser roller thereon cooperating with the pinking wheel, said arm overlying the aperture and preventing contact of the pinking wheel by the operator and having an indicator on the forward end thereof with the end of the indicator located adjacent the work support and indicating th line of cutting of the wheel.

4. In a pinking machine, a work-supporting surface having a narrow aperture therein; a rotary, driven pinking wheel having a peripheral cutting edge disposed in a plane perpendicular to said work-supporting surface and located in the aperture with the work-supporting surface forming a tangent with the cutting edge thereof; a presser roller cooperating with the cutting edge to out work passing therebetween and to feed the work over the work-supporting surface; a post projecting above the work-supporting surface to the rear of the aperture and lying in said plane; and an arm carrying the presser roller centrally pivotall mounted on and supported by the post, said arm extending in the direction of the plane of the pinking wheel and overlying the aperture to prevent contact of the pinking wheel by the operators hands as the work is manipulated and guided thereby over the surfaces adjacent the sides of the arm.

5. In a pinking machine, a work-supporting surface having a narrow aperture therein; a. rotary, driven pinking wheel having a peripheral'cutting edge disposed in a plane perpendicular to said work-supporting surface and located in the aperture with the work-supporting surface forming a tangent with the cutting edge thereof; a presser roller cooperating with the cutting edge to out work passing therebetween and to feed the work over the work-supporting surface; an arm support projecting above the work-supporting surface and lying in said plane, the forward portion of the support having workdeflecting surfaces for engaging and separating the cut edges of the work; and an arm carrying the presser roller at the forward end thereof centrally pivotally mounted on the support, the forward end of said arm extending in the direction of the plane of the pinking wheel and overlying the aperture to prevent contact of the pinking wheel by the operators hands as the work is manipulated and guided thereby over the unobstructed work-supporting surfaces adjacent the sides of the arm and the rear end of said arm carrying adjusting means bearing on' the work-supporting surface at a point in said perpendicular plane and to the rear of the arm support.

6. In a pinking machine, a work-supporting surface having a narrow aperture therein; a rotary, driven pinking wheel having a peripheral cutting edge disposed in a plane perpendicular to said work-supporting surface and located in the aperture with the work-supporting surface forming a tangent with the cutting edge thereof; apresser roller cooperating with the cutting edge to cut WOlk passing therebetween and to feed the work over the work-supporting surface; arm mounting means disposed behind said pinking wheel and lying in the plane thereof; and an arm carrying the presser roller at the forward end thereof centrally mounted on the last-named means, the forward end of said arm extending in the direction of the plane of the pinking wheel and overlying the aperture and having side walls extending to a point adjacent the worksupporting surface to prevent contact of the pinking wheel by the operators hands as the work is manipulated and guided thereby over the work-supporting surfaces adjacent the sides of the arm and the rear end of said arm carrying an adjusting member to engage the Work-supporting surface at a point to the rear of the arm mounting means and in the plane of the pinking wheel.

7. The invention as defined in claim 1 wherein an electric motor is connected to drive the pinking wheel; a base supports said motor; and a housing having the said work-supporting surface as a part thereof is positioned over the base and encloses the motor.

KAJ S. CHRISTENSEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 575,821 Blake Jan. 26, 1897 2,240,996 Maxant May 6, 1941 2,427,025 Sigoda Sept. 9, 1947 

